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Steel Making

Conclusions
Martien was probably never a serious contender for the honor ...

Correction By Zero Adjustment
Many pyrometers are supplied with a zero adjuster, by means ...

Highly Stressed Parts
The highly stressed parts on the Liberty engine consisted of ...

Open Hearth Process
The open hearth furnace consists of a big brick room with a l...

Heat-treating Equipment And Methods For Mass Production
The heat-treating department of the Brown-Lipe-Chapin Company...

Introduction Of Carbon
The matter to which these notes are primarily directed is the...

Heat Treatment Of Steel
Heat treatment consists in heating and cooling metal at defin...

The Packing Department
In Fig. 56 is shown the packing pots where the work is packe...

Brown Automatic Signaling Pyrometer
In large heat-treating plants it has been customary to mainta...

Annealing Work
With the exception of several of the higher types of alloy s...

Refining The Grain
This is remedied by reheating the piece to a temperature slig...

Manganese
Manganese adds considerably to the tensile strength of steel,...

Fatigue Tests
It has been known for fifty years that a beam or rod would fa...

Annealing
There is no mystery or secret about the proper annealing of d...

Making Steel Balls
Steel balls are made from rods or coils according to size, st...

The Influence Of Size
The size of the piece influences the physical properties obta...

Chrome-nickel Steel
Forging heat of chrome-nickel steel depends very largely on ...

Carburizing Material
The simplest carburizing substance is charcoal. It is also th...

Instructions For Working High-speed Steel
Owing to the wide variations in the composition of high-speed...

High-carbon Machinery Steel
The carbon content of this steel is above 30 points and is ha...



An Automatic Temperature Control Pyrometer






Category: PYROMETRY AND PYROMETERS

Automatic temperature control instruments are similar to the Brown
indicating high resistance pyrometer with the exception that the
pointer is depressed at intervals of every 10 sec. upon contact-making
devices. No current passes through the pointer which simply depresses
the upper contact device tipped with platinum, which in turn comes
in contact with the lower contact device, platinum-tipped, and the
circuit is completed through these two contacts. The current is very
small, about 1/10 amp., as it is only necessary to operate the relay
which in turn operates the switch or valve. A small motor is used to
depress the pointer at regular intervals. The contact-making device
is adjustable throughout the scale range of the instrument, and an
index pointer indicates the point on the instrument at which the
temperature is being controlled. The space between the two contacts
on the high and low side, separated by insulating material, is
equivalent to 1 per cent of the scale range. A control of temperature
is therefore possible within 1 per cent of the total scale range.
Figure 131 shows this attached to a small furnace.





Next: Pyrometers For Molten Metal

Previous: Brown Automatic Signaling Pyrometer



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